Sounds like a question to put to your teachers. If they can't give you a satisfactory answer, then you really need better teachers.
But when you pose the question, do it with an attitude of interest, not despair. Ask what kinds of skill the mathematics you're learning will apply to, rather than "Why the $&%^ do I need this #$%!?" The catch-22 of math beyond basic arithmetic is you don't get the practical application until you have learned the mathematics. As you move up through school, there will be things you can't do without what you're supposed to have learned earlier.
OTOH, if you don't want a college education or a professional job later in life, then by all means don't worry about the mathematics.